Car truck and bolster.



PATENTED APR. 28, 1903.

A. B. BELLOWS. CAR TRUCK AND BOLSTER.

APPLICATION FILED APR. 19, 1902.

4 SHEETS-SHEET 1.

NO MODEL.

. PATENTED APR. 28, 1903.

A. B. BELLOWS. GAR TRUCK AND BOLSTER. APPLICATION FILED APR.19, 1902.

4 SHEETS-SHEET 2 N0 MODEL.

www n d Q M 0M d f, A w T PATENTED APR. 28, 1,903.

A. B, BELLOWS. CAR TRUCK AND BOLSTER.

APPLIOATION P11951) APR.19, 1902.

.4 SHEETS-SHEET 3.

NO MODEL.

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N0 MODEL.

INVENTOR UNITED STATES CFFICE.

ARTHUR B. BELLOWS, OF PITTSBURG, PENNSYLVANIA.

CAR TRUCK A'ND BOLSTER.

SPECIFICATION forming part of Letters Patent No. 726,500, dated A'prl21, 1903.

Application filed April 19, 1902.

To @ZZ whom. t may concern:

Be it known that I, ARTHUR B. BELLows, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and useful CarTruck and Bolster, of which the following is a full, clear, and exactdescription, reference being had to the accom panying drawings, formingpart of this specification, in which Figure l is a top plan view of myimproved truck-bolster in position. Fig. 2 is a front elevation of thesame, partly in section. Fig. 3 is an end elevation of the truck withthe bolster in place. Fig. 4 is a cross-section of the transom of Fig.1; and Figs. 5, 6, 7, and 8 are lviews similar to Figs. 1, 2, 3, and 4,respectively, showinga modified form of the invention.

My invention relates to the trucks and truck-bolsters employed inrailway-cars, and is designed to decrease the weight of the bolster andtruck, -to arrange the bolsterso that all its supporting-springs will beunder compression at all times, to provide improved side bearings, andto improve the general construction of the truck. l Referring to theform of Figs. 1, 2, 3, and 4, 2 represents the upper arch member, 3 theinverted arch member, and 4 the tie-bar, of an ordinary diamond truck.The transom is shown as formed of two parallel channels 5 withoutwardly-directed iianges, and at the ends of the transom are securedupper and lower U-shaped plates 6 6, the bases of which are riveted toone of the arch-bars, while the ianges are riveted to the webs ofthechannels. The bolster, which in this form is shown as composed of twoI-beams 7 7, with top and bottom connecting-plates 8 riveted to theirflanges, is located at the central portion of transom andis shorter thanthe transom member, its ends terminating within the side bearings,` Theends of the bolster are guidedby angles 9, riveted to the inner faces ofthe transom-channel. The bolster rests upon springs 10, of which I haveshown eight, in two sets of four each. Each set rests at the bottom upona wooden filler-block 11 within an open-top box 12, preferably formed ofa pressed-steel plate with a iiange extending around it. The sideportions of the flanges are riveted through reinforcing angle-platesSerial No. 103,750. (No model.)

13 to the channel-webs, and a strengtheningplate 14 extends across thebase of the trausom at its intermediate part and is riveted to thebottom channel-danges.

VThe center plate l5 is riveted to the upper plate 8 ofthe bolster.Straps 16 extend across the ends of the bolster and are bolted to theupper channel-anges, these straps serving bolster.

As the bolster is located at the center of the transom and extends onlythrough its intermediate part, I provide yielding side bearings. I haveshown these bearings as consisting of a lower pressedup box 17, with itsend flanges riveted to the channel-webs. This box contains a woodenfiller-block 18, upon which rest the springs 19. These springs at theirupper end bear against the inner face of a pressed-steel member 2O ofinverted-U shape, whose depending side tlanges 21 inclose the sideiianges of the box 17 to guide the vertical movements. A casting 22 isfastened to the l(op of the member 2O and contains a ball-bearing 23.

In the use of the bolster the weight of the car is carried upon thesprings 10, and when the car-body tilts the bolster will tilt slightly;but, all of its supporting-springs will still remain under compression.Under this condition one of the side bearings. will be depressed againstthe yielding spring-pressure. On level portions of the track the springswhich support the bolster will be under' substantially equal pressure,and in its vertical movements it is guided by the brackets or angles 9.

In the form' of Figs. 5 to 8, inclusive, I show \a construction in manyfeatures similar to lthat of the form of Figs. 1 to 4, similar partsbeing designated by similar numerals with the prime-mark. ln this form,however, the bolster is made shallower by doing away with the I-beamportion of the body-bolster and providing an inverted-box structure 24,which forms the bolster-body. This box is preferably formed of a pressedshape or shapes with end anges 25 and side ianges 26. The center plate15' is secured to the vcentral portion of the box. In this case I haveshown the spring-supports 12 as at an intermediate level in the heightof thebolster, while the as stops to limit the upward movement of thelower flanges of the channels arc connected by the plate 14. The actionofthis form is substantially the saine as that in the first form.

The advantages of my invention result from the considerable decrease inweight, owing to the short bolster, also from the constant compressionof all the bolster-springs in any position of the car-body, and,further, from the yielding side bearings and simple and strongconstruction of the transom and bolster.

The bolster and side bearings may be applied to the carinstead of thetruck, and many other variations may be made in the form and arrangementof' the truck, the transom, the bolster, side bearings, dac., Withoutdeparting from my invention. f

I claim- 1. A truck having a transom formed of laterally-separatedmembers, a short stiff bolster located between said members andterminating between the side bearings, spring-supports secured rigidlybetween the transom side members, and springs thereon located beneathand supporting the short bolster; substantially as described.

2. A truck having a transom formed of laterally-separated side members,yielding side bearings, a short stii bolster located between the sidemembers, spring-bearings secured rigidly beneath the bolster and betweenthe side members, and `springs thereon supporting the bolster;substantially as described.

3. A truck having a transom with separated side members, a stift'bolster between the sido members and terminating between the sidebearings, end guides for the bolster secured to the inner faces ot theside members, and bolster-supporting springs carried on supports securedto the side member; substantially as described.

4. A transom having separated side members, a stiff bolster shorter thanthe transom and located between its side members, a center plate carriedon the bolster, spring-supports beneath thc bolster and secured rigidlybetween the side members, and springs thereon support-ing thestiff-bolster member; substantially as described.

5. A transom having intermediate flanged supports secured rigidlybetween its separated side members, springs resting on said supports, ashort stii bolster resting on the springs, and end guides for thebolster, al1 said parts being located in the intermediate part of saidtransom and between its side members; substantially as described.

6. A transom having a strengthening-plate secured across the baseportions of the separated transom members at their central portion, andbolster-springs carried on a rigid support secured above said plate andbetween the separated transom members; substantially as described.

7. Acar-truck havingspring-supported side bearings, guides therefor, ashort central bolster With its ends between the side bearings, andspring-supports for the bolster secured rigidly to the transom saidparts being placed between the separated webs of the side members of thetransom; substantially as described.

8. A transom-'having separated flanged side members the iianges beingreinforced; substantially as described.

9. A transom having separated flanged side members the flanges beingreinforced by added flanged members, and a bolster between said sidemembers; substantially as described.

` In testimony whereof I have hereunto set my hand.

ARTHUR I3. BELLOWS. lVitnesses: f

I-I. M. CoRwIN, GEO. B. BLEMING.

